AGASC ID 187568224

Info

Last Obs. 2024:310:16:16
magcatalog 7.87 ± 0.02
mag3 arcsec 7.89 ± 0.02
mag5 arcsec 7.89 ± 0.02
Nobs 10 (0 bad)
fok 99.8%
f3 arcsec 100.0%
f5 arcsec 100.0%

Timeline

Observation Info

OBSID Time Slot Row Col N Nmag est ok Nout fmag est ok fdr3 fdbox5 fmag est ok 3 ⟨ δ mag ⟩ 100s ⟨ mag ⟩ σmag Comments
52864 2014:099:00:36:11.669 4 137.6 -122.4 1072 1011 3 98.9% 100.0% 100.0% 98.9% 0.02 7.88 0.00 --
47382 2020:074:05:10:53.475 4 308.6 202.7 953 906 1 99.7% 100.0% 100.0% 99.7% 0.02 7.86 0.00 --
45166 2022:289:10:25:20.039 2 -134.7 -283.6 2084 2036 3 100.0% 100.0% 100.0% 100.0% 0.02 7.88 0.00 --
45159 2022:289:19:49:24.879 2 -148.7 1.9 2223 2144 0 99.4% 100.0% 100.0% 99.4% 0.05 7.92 0.00 --
44079 2023:289:10:17:18.522 1 -485.1 -282.7 1752 1296 0 100.0% 100.0% 100.0% 100.0% 0.02 7.90 0.00 --
44075 2023:289:15:31:48.639 1 -484.8 -283.2 779 735 0 100.0% 99.9% 100.0% 99.9% 0.02 7.90 0.00 --
44072 2023:292:01:21:07.844 0 -481.6 -288.6 1893 1841 1 100.0% 100.0% 100.0% 100.0% 0.02 7.90 0.00 --
44068 2023:292:07:00:37.267 0 -481.3 -289.2 635 592 2 99.8% 100.0% 100.0% 99.8% 0.02 7.90 0.00 --
44065 2023:294:15:47:52.947 0 -478.3 -294.0 3035 2589 0 100.0% 100.0% 100.0% 100.0% 0.02 7.90 0.00 --
42999 2024:310:16:16:44.104 2 -31.7 -305.9 319 273 3 100.0% 100.0% 100.0% 100.0% 0.01 7.91 0.00 --

  • sample: One sample of ACA image telemetry. This could be a real image readout or it could be a null 4x4 image when the ACA is not tracking. Be aware that the sample period is faster for null 4x4 images (1.025 sec) than for typical 6x6 or 8x8 tracked images (2.05 or 4.1 sec respectively).
  • Kalman samples: Subset of samples when ACA could be tracking stars (AOPCADMD == NPNT & AOACASEQ == KALM)
  • dr3: Subset of tracked Kalman samples with radial centroid residual < 3 arcsec. This corresponds to "high quality" readouts. This effectively includes the track subset (AOACFCT == TRAK) because readouts with no TRAK are assigned an infinite centroid residual.
  • dbox5: Subset of tracked Kalman samples with centroid residual within a 5 arcsec box. This corresponds to spatial filter used by the OBC for inclusion in Kalman filter. This effectively includes the track subset (AOACFCT == TRAK) because readouts with no TRAK are assigned an infinite centroid residual.
  • track: Subset of Kalman samples where the image is being tracked (AOACFCT == TRAK)
  • sat_pix: Subset of Kalman samples with saturated pixel flag OK (AOACISP == OK)
  • ion_rad: Subset of Kalman samples with ionizing radiation flag OK (AOACIIR == OK)
  • mag_est_ok: Subset of Kalman samples that have a magnitude estimate (track & ion_rad)
  • n_total: Total number of sample regardless of OBC PCAD status
  • n: Synonym for n_total
  • n_kalman: Number of Kalman samples
  • n_dr3: Number of dr3 samples.
  • n_dbox5: Number of dbox5 samples.
  • n_track: Number of track samples.
  • n_ok_3: Number of (track & sat_pix & ion_rad & dr3) samples
  • n_ok_5: Number of (track & sat_pix & ion_rad & dbox5) samples
  • n_mag_est_ok: Number of (track & ion_rad) samples
  • n_mag_est_ok_3: Number of (track & ion_rad & dr3) samples
  • n_mag_est_ok_5: Number of (track & ion_rad & dbox5) samples
  • f_dr3: Fraction of mag-est-ok samples with centroid residual < 3 arcsec((mag_est_ok & n_dr3)/n_mag_est_ok)
  • f_dbox5: Fraction of mag-est-ok samples with centroid within 5 arcsec box((mag_est_ok & n_dbox5)/n_mag_est_ok)
  • f_mag_est_ok: n_mag_est_ok_3/n_kalman. This is a measure of the fraction of time during an observation that a magnitude estimate is available.
  • f_mag_est_ok_3: n_mag_est_ok_3/n_kalman.
  • f_mag_est_ok_5: n_mag_est_ok_5/n_kalman.
  • f_ok: n_ok_5 / n_kalman. Same as f_ok_5
  • f_ok_3: n_ok_3 / n_kalman. This is a measure of the fraction of time during an observation that the Kalman filter is getting high-quality star centroids.
  • f_ok_5: n_ok_5 / n_kalman. This is a measure of the fraction of time during an observation that the Kalman filter is getting any star centroid at all. This includes measurements out to 5 arcsec box halfwidth, so potentially 7 arcsec radial offset.